Installing openwrt on Fonera 2.0g / fon2202 device

I want to install my own 19.07.3 openwrt build. Fon2202 has stock firmware right now. This guide https://openwrt.org/toh/fon/fonera2 tells me to use lzma and squashfs files, but my make command resulted in these files:

config.buildinfo
feeds.buildinfo
openwrt-ath25-default.manifest
openwrt-ath25-generic-kernel.elf
openwrt-ath25-generic-kernel.gz
openwrt-ath25-generic-kernel.lzma
openwrt-ath25-generic-squashfs-rootfs.bin
openwrt-ath25-generic-squashfs-sysupgrade.bin
openwrt-ath25-ubnt2-pico2-squashfs-sysupgrade.bin
packages
sha256sums
version.buildinfo

As you can see i don't have the openwrt-ath25-root.squashfs file, but I do have openwrt-ath25-generic-squashfs-rootfs.bin file. Can i follow the same guide using the bin file instead? What other options do i have to install openwrt?

Thanks